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authorIngo Molnar <mingo@elte.hu>2006-12-12 12:10:28 +0100
committerLinus Torvalds <torvalds@woody.osdl.org>2006-12-12 08:10:44 -0800
commit99a3eb3845f034eb55640a3da73e5e28349678c6 (patch)
tree9a6704ac9d8bb0ab2b3649cb05999daa0e96175c /include/linux/seqlock.h
parentd907dd2efd69195f4a5fc584a0eaecc599ca4c2c (diff)
downloadlinux-99a3eb3845f034eb55640a3da73e5e28349678c6.tar.gz
[PATCH] lockdep: fix seqlock_init()
seqlock_init() needs to use spin_lock_init() for dynamic locks, so that lockdep is notified about the presence of a new lock. (this is a fallout of the recent networking merge, which started using the so-far unused seqlock_init() API.) This fix solves the following lockdep-internal warning on current -git: INFO: trying to register non-static key. the code is fine but needs lockdep annotation. turning off the locking correctness validator. __lock_acquire+0x10c/0x9f9 lock_acquire+0x56/0x72 _spin_lock+0x35/0x42 neigh_destroy+0x9d/0x12e neigh_periodic_timer+0x10a/0x15c run_timer_softirq+0x126/0x18e __do_softirq+0x6b/0xe6 do_softirq+0x64/0xd2 ksoftirqd+0x82/0x138 Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/linux/seqlock.h')
-rw-r--r--include/linux/seqlock.h7
1 files changed, 5 insertions, 2 deletions
diff --git a/include/linux/seqlock.h b/include/linux/seqlock.h
index 46000936f8f..6b0648cfdff 100644
--- a/include/linux/seqlock.h
+++ b/include/linux/seqlock.h
@@ -44,8 +44,11 @@ typedef struct {
#define SEQLOCK_UNLOCKED \
__SEQLOCK_UNLOCKED(old_style_seqlock_init)
-#define seqlock_init(x) \
- do { *(x) = (seqlock_t) __SEQLOCK_UNLOCKED(x); } while (0)
+#define seqlock_init(x) \
+ do { \
+ (x)->sequence = 0; \
+ spin_lock_init(&(x)->lock); \
+ } while (0)
#define DEFINE_SEQLOCK(x) \
seqlock_t x = __SEQLOCK_UNLOCKED(x)